Hydraulic transmission



AprilY A12, 1927.

E. G. fJ'AcKER HYDRAULIC TRANSMISSIO N Filed July 8, 1919 Patented Apia 12,1927. i

UNITED` vsfiArEs. PATENT OFFICE. f

EDWARD o.. JACKER, or

CHICAGO, ILLINOIS, AssIeNoa or oNE-HALrTo VINCENI` BENDIX, or CHICAeo, ILLINoIs.

HYDRAULIC TRANSMISSION.

Application inea .ruiy' s, 1919. -sveriai No. 309,458,

tain the desired result. Necessarily this' mechanism required lubrication and`in time the parts would become worn and require to be replace-d or repaired. By the use of my invention these Aobjectionable features are eliminated since it consists of a pump for driving and a motor to be driven. Preferably the liquid used in the pumpand motor are preferably of a rotary type. To decrease thej speed' and increase the power, the pump. 'is made smaller than the motor, and of course to increase the speed and decrease the power, 'the pump is made larger than the motor.-

To describe my'invention so thatothers versed in the art to which it pertains can make and use the saine, I have illustrated the same on the accompanying sheet of drawing, forming a part of this specification and in which Figure 1, is a plan view of a hydraulic transmission embodying my invention; Fig. 2, is an end view of thesame; Fig.' 3, is a Fig. 1, Viewed inthe direction indicated by th e arrows; Fig.V 4 is a similar View taken on line 4-4 of Fig. 1,.- viewed in the direction indicated by the arrows ;"and Figs. 5 and 6 are similar views showing the valves in different positions.

Similar reference Ycharacters refer to simhead 1,1, v secured to the frame,7, suitable is a. lubricating oil and the pumpand motor 8 fthe motor 8 in one direction 'valves 14 and 16 are cross sectional view taken on linel 3-3 of 'F only of passageway bolts, and the larger compartment is closed by a head. 12, secured to the frame, 7, by suitable bolts. 'i i Referring to Fig. 4, it will be noted thatthe intakeport 13 of pump 9 is'provided with a`valve 14 and the outlet port 1'5, of

said pump .9 is provided with a valve 16,"

and as'seen in Fig. 2, said two valvesare 'connected to act in unison. Suitable ports or passagesA are cored out in the cast frame,`

7, to make proper connections.- i

A passageway 17 connects the inlet 13 and the outlet 15 on one side of in Fig. 4, and a passageway 18' connects said inlet 13 and outlet 15 on the other side ofA pump 9. A branch passageway 19 connects the passageway 17 to one side` of motorgS and a branch .passageway 20 connects the passageway 18 to the other side `of the motor K T ie valves 14 and 16 it will be noted are so .constructed that when placed in central position, as shown in F ig. 5, the Huid or oil is free to pass from the outlet port 15 through. both passageways 17 and 18, and thence into the pump 9 through inlet port 13.

VThus when 4the valves 14 and 16 are in the positionishown in Fig. 4, the rotation or o'peration of pump 9 will rotate or operate and when the Said valves 14 and -16 are in the position shown in Fig. 6, the rotation or operation of pump 9 will rotate or operate the motor 8 in-the opposite direction, andv whensaid in the position Shown in or operation of pump 9 Will not `operate the motor 8 because all the fluid or oil forced out through the outlet port 15 is free to pass through passageways 17 and 18 back intothe. inlet port 13.

Wlienthe valves 14.and 16 are in the polsition shown in Fig. 4, the course of the Huid or oil is from pump 9 through outlet port 15, through valve 16, through a part only of passageway 1 8, through passageway 20, to. motor 8, thence through passageway 19,' through a part only of passageway 17, through valve .14, and thence through the inlet port- 18 and back to pump 9.

en the valves 14 and 16 are in the position shown in Fig. 6, the course of the fluid or oil will be frin ig. 5 the rotation pump 9, through outlet pump 9 as lviewed f port 15, through valve 16, through a part 17, through passageway ,Y 19 to motor S, thence,A through passageway 20, through a part only of passageway 18,

through valve 14, and thence through inlet port 13, and hackto pump 9. L i

Thus whilepum'p 9 is 'constantly rotating., or operating in one vdirection the motor 8 can, be driven forward, or reverse, or not driven in either direction by simply manipulating the valves 14 and 16.-

The head ll'is pierced by shaft '21 rigidly keyed to one of the two' gear'wheels forming pump 9 and is connected to the 'sourceof power. The head 12 is pierced by theshaft 22 rigidly keyed to one of the two gears forming he motor 8 and is connected to the part or mechanism to be driven.

The valve 16 4has la hand lever 23fsecured lthereto by means of which s aid`valv'e is pivoted' operated. A connecting link 24 is at one end to the hand lever 23 and at the .other end to `the free end of a crankarmv 25 secured' to`valve 141:. Said parts are so arranged and constructed that the-two valves r14: and 16 will always be moved in unison by, the hand lever 28.

- By thisimproved mechanism it possible to provide'any desired ratio; between the` driven motor, and it is therepump and the fore applicable to any mechanism whatever.

I prefer connection with the passages for oi-l to pre- ,provide an air pocket 26 in It will be. understood that ii it is desired ,to increase the speed from the drivingpump .to the motor, it ',1s only necessary to make the .motor the driving pumpand pump f3 the driven inotor.

Having thus fully described my invent/ion1 whatlclaini as `new andrdesire to secureby Letters Patent'of the'United States is ln a device of the class described, 'a casing' of a flattened cylindrical shape having.

both ends losedi'and provided' onits interior with a' pumpchamhenand a motor chamber and apassageWay entirely surrounding vthe pump icliamber and conforming to its conin .the flattened sides of the casing forming at'tlie junctions of said passageways to control the passage of fluid therethrough con- "nected to operate in unison and other passageways connecting" said first. named passageway to the inlet and outlet sides'of the motor chamber; 4In testi ony whereof I have signed my name to liliis specification this 31st day of May, 191W at Chicago, Illinois 1 `short" jpassageways 'centrally disposed e l' A EDWARD e. JAoKEii. 

